CN110185579A - A kind of speed change feathering closing method, device and Wind turbines - Google Patents
A kind of speed change feathering closing method, device and Wind turbines Download PDFInfo
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- CN110185579A CN110185579A CN201910509228.6A CN201910509228A CN110185579A CN 110185579 A CN110185579 A CN 110185579A CN 201910509228 A CN201910509228 A CN 201910509228A CN 110185579 A CN110185579 A CN 110185579A
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- 230000008859 change Effects 0.000 title claims abstract description 43
- 239000002002 slurry Substances 0.000 claims abstract description 59
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- 238000001514 detection method Methods 0.000 claims description 10
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- 230000008569 process Effects 0.000 abstract description 19
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- 238000010586 diagram Methods 0.000 description 8
- 240000002853 Nelumbo nucifera Species 0.000 description 3
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 3
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 3
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- 238000006243 chemical reaction Methods 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/304—Spool rotational speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/335—Output power or torque
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The application proposes a kind of speed change feathering closing method, device and Wind turbines, is related to Wind turbines feathering and shuts down technical field.Wind turbines include generator and cabin, and generator is mounted in cabin, this method comprises: the shutdown of Wind turbines is changed to the second shutdown feathering rate by the first initial shutdown feathering rate along slurry rate according to the revolving speed of generator and the acceleration of cabin；Wherein, the first shutdown is determined along slurry rate by the propeller pitch angle of Wind turbines initial time, and the second shutdown feathering rate is determined by the propeller pitch angle at Wind turbines current time；The shutdown of Wind turbines is changed to third by the second shutdown feathering rate along slurry rate according to the revolving speed of generator and power and shuts down feathering rate, and feathering rate is shut down with third and completes feathering and shutdown.Wind turbines having the effect of in stopping process is enabled to reduce load well by the present processes, device.
Description
Technical field
This application involves Wind turbines feathering shut down technical field, in particular to a kind of speed change feathering closing method,
Device and Wind turbines.
Background technique
In order to reduce load of the Wind turbines in stopping process, scheme is often shut down using variable Rate feathering and controls wind-powered electricity generation
Compressor emergency shutdown.But existing variable Rate feathering is shut down scheme and is turned using regular time or pitch Angle Position as variable Rate
Condition is changed, so that the load shedding effect of Wind turbines is bad.
Summary of the invention
The application's is designed to provide a kind of speed change feathering closing method, device and Wind turbines, enables to wind
Motor group having the effect of in stopping process reduces load well.
To achieve the goals above, the embodiment of the present application the technical solution adopted is as follows:
In a first aspect, the embodiment of the present application provides a kind of speed change feathering closing method, it is applied to Wind turbines, Wind turbines
Including generator and cabin, generator is mounted in cabin, this method comprises: according to the acceleration of the revolving speed of generator and cabin
The shutdown of Wind turbines is changed to the second shutdown feathering rate by the first initial shutdown feathering rate along slurry rate；Wherein,
First shuts down suitable slurry rate is determined by the propeller pitch angle of Wind turbines initial time, and the second shutdown feathering rate is current by Wind turbines
The propeller pitch angle at moment determines；The shutdown of Wind turbines is shut down into feathering by second along slurry rate according to the revolving speed of generator and power
Rate is changed to third and shuts down feathering rate, and shuts down feathering rate with third and complete feathering and shutdown.
Second aspect, the embodiment of the present application provide a kind of speed change feathering arresting gear, are applied to Wind turbines, Wind turbines
Including generator and cabin, generator is mounted in cabin, which includes: the first speed-variable module, for according to generator
The shutdown of Wind turbines is shut down feathering rate by initial first along slurry rate and is changed to second by revolving speed and the acceleration of cabin
Shut down feathering rate；Wherein, the first shutdown is determined along slurry rate by the propeller pitch angle of Wind turbines initial time, and second shuts down feathering
Rate is determined by the propeller pitch angle at Wind turbines current time；Second speed-variable module, for being incited somebody to action according to the revolving speed and power of generator
The shutdown of Wind turbines is changed to third by the second shutdown feathering rate along slurry rate and shuts down feathering rate, and suitable with third shutdown
Paddle rate completes feathering and shutdown.
The third aspect, the embodiment of the present application provide a Wind turbines, including detection device, controller, generator and cabin,
Generator is mounted in cabin, and controller is electrically connected with detection device and generator；Detection device for acquiring wind-powered electricity generation in real time
The propeller pitch angle of unit, the revolving speed of generator, the acceleration of cabin and the power of generator, and by the propeller pitch angle of Wind turbines, hair
The power of the revolving speed of motor, the acceleration of cabin and generator is sent to controller；Controller is used for the revolving speed according to generator
The shutdown of Wind turbines is changed to the second shutdown by the first initial shutdown feathering rate along slurry rate with the acceleration of cabin
Feathering rate；The shutdown of Wind turbines is shut down feathering rate by second along slurry rate and become by revolving speed and power also according to generator
More third shuts down feathering rate, and shuts down feathering rate with third and complete feathering and shutdown；Wherein, it first shuts down along slurry rate
It is determined by the propeller pitch angle of Wind turbines initial time, second, which shuts down feathering rate, shuts down the change of feathering rate by the first of Wind turbines
More second propeller pitch angle for shutting down the feathering rate moment determines.
Compared with the existing technology, a kind of speed change feathering closing method, device provided by the embodiment of the present application and generator
Group, the speed change feathering closing method and device are applied to Wind turbines, and Wind turbines include generator and cabin, generator installation
In cabin.The speed change feathering closing method is according to the revolving speed of generator and the acceleration of cabin by the shutdown of Wind turbines along slurry
Rate is changed to the second shutdown feathering rate by the first initial shutdown feathering rate；Wherein, it first shuts down along slurry rate by wind
The propeller pitch angle of motor group initial time determines that the second shutdown feathering rate is determined by the propeller pitch angle at Wind turbines current time.Again
The shutdown of Wind turbines third is changed to by the second shutdown feathering rate along slurry rate according to the revolving speed of generator and power to stop
Machine feathering rate, and feathering rate is shut down with third and completes feathering and shutdown.As it can be seen that the speed change feathering closing method of the application exists
When determining that the first shutdown is shut down along slurry rate and second along slurry rate, determined according to the propeller pitch angle of Wind turbines, by propeller pitch angle
Aerodynamic sensitivsty takes into account the loading effect in stopping process, load fluctuation caused by can reducing due to feathering movement.
Meanwhile being changed in the condition of the second shutdown feathering rate in the first shutdown feathering rate, according to turning for generator
The acceleration of speed and cabin can not only effectively avoid generator hypervelocity risk as switch condition, and be effectively reduced quickly
Ultimate load in stopping process.It is changed in the condition that third shuts down feathering rate in the second shutdown feathering rate, according to hair
The revolving speed and power of motor are as switch condition, it is ensured that conversion of the generator under any wind regime, which can be effectively reduced, to stop
Airborne lotus has wider array of adaptability.
To enable the above objects, features, and advantages of the application to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural block diagram of Wind turbines provided by the embodiments of the present application；
Fig. 2 is the flow diagram of speed change feathering closing method provided by the embodiments of the present application；
Fig. 3 is the flow diagram of a seed step of step S101 shown in Fig. 2；
Fig. 4 is the flow diagram of another seed step of step S101 shown in Fig. 2；
Fig. 5 is the structural block diagram of speed change feathering arresting gear provided by the embodiments of the present application；
Fig. 6 is the structural block diagram of the first speed-variable module of speed change feathering arresting gear shown in fig. 5.
In figure: 1- Wind turbines；10- detection device；20- controller；30- generator；40- cabin；50- speed change feathering stops
Machine device；The first speed-variable module of 51-；511- rotation speed change determination unit；512- changing unit；The second speed-variable module of 52-.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiments herein provided in the accompanying drawings is not intended to limit below claimed
Scope of the present application, but be merely representative of the selected embodiment of the application.Based on the embodiment in the application, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model of the application protection
It encloses.
In the description of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
Connection inside element.For the ordinary skill in the art, above-mentioned term can be understood in the application with concrete condition
In concrete meaning.
With reference to the accompanying drawing, it elaborates to some embodiments of the application.In the absence of conflict, following
Feature in embodiment and embodiment can be combined with each other.
Referring to Fig. 1, being a kind of structural block diagram of Wind turbines 1 provided by the embodiments of the present application.Wind turbines 1 include inspection
It surveys device 10, controller 20, generator 30 and cabin 40, generator 30 to be mounted in cabin 40, controller 20 and detection device
10 and generator 30 be electrically connected.
In the present embodiment, detection device 10 for acquire in real time the propeller pitch angles of Wind turbines 1, generator 30 revolving speed,
The acceleration of cabin 40 and the power of generator 30, and by the propeller pitch angle of Wind turbines 1, the revolving speed of generator 30, cabin 40
The power of acceleration and generator 30 is sent to controller 20.
It is appreciated that detection device 10 includes position sensor, encoder, vibrating sensor and power sensor, position
Sensor, encoder, vibrating sensor and power sensor are electrically connected with controller 20.Position sensor is mounted on wind turbine
On the blade of group 1, controller 20 is sent to for acquiring the propeller pitch angle of Wind turbines 1 in real time, and by propeller pitch angle；Encoder installation
On generator 30, controller 20 is sent to for acquiring the revolving speed of generator 30 in real time, and by the revolving speed of generator 30；Vibration
Sensor is mounted in cabin 40, is sent out for acquiring the acceleration vibrated before and after cabin 40 in real time, and by the acceleration of cabin 40
It send to controller 20；Power sensor is mounted on generator 30, for acquiring the power of generator 30 in real time, and by generator
30 power is sent to controller 20.
In the present embodiment, controller 20 is used for according to the propeller pitch angle of Wind turbines 1, the revolving speed of generator 30, cabin 40
Acceleration and the power of generator 30 determine the shutdown feathering rates of the different shutdown phases of Wind turbines 1, and according to wind turbine
Feathering and the shutdown shutting down feathering rate and complete Wind turbines 1 of the different shutdown phases of group 1.
Wherein, controller 20 can for programmable logic controller (PLC) (Programmable Logic Controller,
PLC), and it is arranged on generator 30.Controller 20 guarantees that blade is shut down according to Wind turbines 1 are different by variable pitch executing agency
The shutdown feathering rate in stage completes feathering.
Fig. 2 shows a kind of flow charts of speed change feathering closing method provided by the embodiments of the present application, it should be noted that,
Speed change feathering closing method described herein is not limitation with Fig. 2 and specific order as described below.It should be appreciated that
In other embodiments, the sequence of speed change feathering closing method part step described herein can phase according to actual needs
Part steps interchangeable or therein also can be omitted or delete.Detailed process shown in Fig. 2 will be explained in detail below
It states.Referring to Fig. 2, the present embodiment describes the process flow of the controller 20 of Wind turbines 1, which comprises
Step S101, according to the revolving speed of generator and the acceleration of cabin by the suitable slurry rate of the shutdown of Wind turbines by initial
First shutdown feathering rate be changed to the second shutdown feathering rate；Wherein, the first shutdown is initial by Wind turbines along slurry rate
The propeller pitch angle at moment determines that the second shutdown feathering rate is determined by the propeller pitch angle at Wind turbines current time.
It is analyzed according to gas dynamic theory, the propeller pitch angle of Wind turbines 1 is bigger, the aerodynamic sensitivsty of the blade of Wind turbines 1
dTair/ d θ is bigger, i.e., the pitch rate of unit can lead to the variation of bigger air torque, wherein TairFor air
Torque, θ are propeller pitch angle.
In the present embodiment, in order to effectively control the caused air torque variation of feathering movement in stopping process, so
First shut down feathering rate size according to the propeller pitch angle of 1 initial time of Wind turbines determine, second shut down feathering rate according to
First shutdown feathering rate is changed to the propeller pitch angle at the second shutdown feathering rate moment and determines.It is appreciated that in Wind turbines 1
The numerical relation table of different shutdown feathering rates from corresponding different propeller pitch angles is previously stored in controller 20.When controller 20
When obtaining the propeller pitch angle of 1 initial time of Wind turbines according to position sensor, controller 20 can be according to 1 initial time of Wind turbines
Propeller pitch angle is searched in the numerical relation table for shutting down feathering rate and propeller pitch angle, obtains the first shutdown feathering rate.If controller
20 can not directly look into the numerical relation table for shutting down feathering rate and propeller pitch angle according to the propeller pitch angle of 1 initial time of Wind turbines
The first shutdown feathering rate is found, the first shutdown feathering rate can be obtained using the method for interpolation.Similarly, controller 20
The first shutdown feathering rate, which is obtained, according to position sensor is changed to the propeller pitch angle at the second shutdown feathering rate moment, controller 20
It is changed to the propeller pitch angle at the second shutdown feathering rate moment according to the first shutdown feathering rate, is shutting down feathering rate and propeller pitch angle
It is searched in numerical relation table and obtains the second shutdown feathering rate.If controller 20 directly can not shut down feathering rate and propeller pitch angle
Numerical relation table in search and obtain the second shutdown feathering rate, the method that interpolation can be used obtains the second shutdown feathering speed
Rate.
Under different wind regime, the shutdown of Wind turbines 1 is changed to the by initial first shutdown feathering rate along slurry rate
The judgment basis of two shutdown feathering rates is not identical.As shown in figure 3, the sub-step process for step S101 under normal wind regime is shown
It is intended to, comprising the following steps:
Step S1011 obtains generator according to the maximum (top) speed of the revolving speed of generator, the acceleration of generator and setting
Exceed the speed limit risks and assumptions.
In the present embodiment, the hypervelocity risk of generator 30 can be characterized with the hypervelocity risks and assumptions of generator 30, be surpassed
The hypervelocity risk of fast risks and assumptions more small generators 30 is bigger.Hypervelocity risks and assumptions can be obtained using following formula:
(ωgmax-ωg)/ag。
Wherein, ωgmaxFor the maximum (top) speed of setting, i.e. the maximum (top) speed allowed of generator 30；ωgFor generator 30
Revolving speed；agFor 30 acceleration of generator.
Step S1012, when hypervelocity risks and assumptions no longer become smaller and the acceleration of cabin continues the first preset time less than the
When one preset value, the shutdown of Wind turbines is changed to the second shutdown feathering by the first initial shutdown feathering rate along slurry rate
Rate.
In the present embodiment, when hypervelocity risks and assumptions no longer become smaller and the acceleration of cabin 40 to continue the first preset time small
When the first preset value, then it is assumed that generator 30 is there is no hypervelocity risk and has reduced the limit during quick shutdown
Load, therefore it is suitable the shutdown of Wind turbines 1 can be changed to the second shutdown by the first initial shutdown feathering rate along slurry rate
Paddle rate allows Wind turbines 1 to carry out the feathering stopping process in next stage with the second shutdown feathering rate.
Wherein, controller 20 then judges that hypervelocity wind is not present in generator 30 when the risks and assumptions that exceed the speed limit no longer become smaller
Danger.Meanwhile reporting by mistake in order to prevent, the acceleration of cabin 40 is the first preset time less than the duration of the first preset value.The
The value range of one preset value can be -0.02m/s to 0m/s, and the first preset time can be set to 200ms.
As shown in figure 4, for the sub-step flow diagram of step S101 under big wind regime, comprising the following steps:
Step S1013 obtains generator according to the maximum (top) speed of the revolving speed of generator, the acceleration of generator and setting
Exceed the speed limit risks and assumptions.
Step S1014, when hypervelocity risks and assumptions continue that the second preset time no longer becomes smaller and the acceleration of cabin continues the
When one preset time is greater than the first preset value, the shutdown of Wind turbines is shut down into feathering rate by initial first along slurry rate and is become
More second shuts down feathering rate.
It is appreciated that the shutdown of Wind turbines 1 is shut down feathering rate by initial first along slurry rate and is become under big wind regime
More second shuts down the switch condition of feathering rate, not only to meet hypervelocity risks and assumptions and no longer become smaller and the acceleration of cabin 40
Continue the first preset time greater than the first preset value, also needs to meet hypervelocity risks and assumptions and continue the second preset time and no longer become smaller.
If hypervelocity risks and assumptions continue the second preset time and no longer become smaller, can guarantee generator 30 will not because wind speed becomes larger and again
Hypervelocity.Wherein, the value range of the second preset time can be 1.2-2s.
The shutdown of Wind turbines is shut down feathering by second along slurry rate according to the revolving speed of generator and power by step S102
Rate is changed to third and shuts down feathering rate, and shuts down feathering rate with third and complete feathering and shutdown.
In the present embodiment, in varied situations, the shutdown of Wind turbines 1 is shut down feathering rate by second along slurry rate and is become
The judgment basis that more third shuts down feathering rate is also different.
Under normal circumstances, the shutdown of Wind turbines 1 is changed to third shutdown by the second shutdown feathering rate along slurry rate
The judgment basis of feathering rate are as follows: when the revolving speed of generator 30 is pre- lower than third lower than the power of the second preset value and generator 30
If when value, the shutdown of Wind turbines 1 being changed to third by the second shutdown feathering rate along slurry rate and shuts down feathering rate.
It is appreciated that the revolving speed when generator 30 is lower than third preset value lower than the power of the second preset value and generator 30
Afterwards, the air torque acted on Wind turbines 1 is very low, will not impact to the safety of generator 30, power generation
Machine 30 has successfully avoided the ultimate load in stopping process, and controller 20 then can be by the shutdown feathering speed of Wind turbines 1
Rate has the second shutdown feathering rate to be changed to third shutdown feathering rate, allows Wind turbines 1 to shut down feathering rate with third and carries out
The feathering stopping process in next stage.Wherein, the second preset value can be set to generator 30 it is grid-connected when tachometer value；Third
Preset value can be set to performance number when 30 off-grid of generator.
In abnormal cases or greatly under wind regime, the shutdown of Wind turbines 1 shuts down the change of feathering rate by second along slurry rate
The judgment basis of feathering rate is shut down for third are as follows: when the revolving speed of generator 30 is lower than the second preset value, the power of generator 30
Third preset time and wind turbine are reached with the time of the second shutdown feathering rate operation lower than third preset value, Wind turbines 1
When 1 current propeller pitch angle of group reaches four preset values, the shutdown of Wind turbines 1 is shut down into feathering rate by second along slurry rate and is become
More third shuts down feathering rate.
It is appreciated that the shutdown of Wind turbines 1 is stopped along slurry rate by initial second in abnormal cases or greatly under wind regime
Machine feathering rate is changed to the switch condition that third shuts down feathering rate, and the revolving speed that not only meet generator 30 is pre- lower than second
If the power of value and generator 30 is lower than third preset value, Wind turbines 1 are also needed to meet with second and shut down the operation of feathering rate
Time reaches third preset time and the propeller pitch angle at 1 current time of Wind turbines reaches the 4th preset value.When Wind turbines 1 are with
The times of two shutdown feathering rates operations reach third preset time and Wind turbines 1 by the second shutdown feathering rate are changed to the
When the propeller pitch angle at three shutdown feathering rate moment reaches four preset values, then show that the propeller pitch angle of Wind turbines 1 is sufficiently large,
The air torque acted on 30 groups of generator is very low, even if there is big wind regime, the limit will not be caused to carry blower
Lotus.Or in the case where there is encoder fault, because the revolving speed of abnormal conditions generator 30 is lower than the second preset value, work as wind-powered electricity generation
Unit 1 reaches third preset time with the time of the second shutdown feathering rate operation and Wind turbines 1 shut down feathering speed by second
When the propeller pitch angle that rate is changed to the third shutdown feathering rate moment reaches four preset values, it also can guarantee that blower avoids stopping process
In ultimate load.
Wherein, third preset time can the rule of thumb value between 15-20s, the 4th preset value can also be according to warp
Test the value between 20 ° -30 °.
In the present embodiment, entire stopping process is divided into three operation phase, the first operation phase shut down with first
The operation of feathering rate, the second operation phase shut down feathering rate with second and run, and the third operation phase shuts down feathering speed with third
Rate operation.And first shuts down feathering rate greater than third shutdown feathering rate, third shutdown feathering rate is shut down suitable greater than second
Paddle rate.Feathering rate is shut down using biggish first in the first operation phase, can effectively inhibit the hypervelocity phenomenon of generator 30
Generation, and avoid being become larger by hypervelocity bring load；Feathering rate is shut down using lesser second in the second operation phase, it can
Be effectively reduced generator 30 due to caused by quick shutdown load become larger；Stopped in the third operation phase using biggish third
Machine feathering rate can accelerate 30 groups of generator of stopping process, allow 30 groups of generator cracking to stop.
It further, in the present embodiment, can be different value according to the acceleration of cabin 40 in the second operation phase
When, it is correspondingly arranged different second and shuts down feathering rate.It can be according to the carrying out practically state of Wind turbines 1, more efficient drop
Low shutdown load.
Further, in the present embodiment, the process of the second shutdown feathering rate is changed in the first shutdown feathering rate
In and second shutdown feathering rate be changed to third shut down feathering rate during, control the variable pitch acceleration of propeller pitch angle
Not higher than the 5th preset value.
It is appreciated that dashing forward during the variation of the shutdown feathering rate of Wind turbines 1 in order to inhibit to shut down feathering rate
The problem of load caused by becoming becomes larger needs to control the variable pitch acceleration of propeller pitch angle not higher than the 5th preset value, can reduce and stop
Load fluctuation caused by machine feathering rate is mutated increases.
Referring to Fig. 5, Fig. 5 is a kind of schematic structure frame of speed change feathering arresting gear 50 provided by the embodiments of the present application
Figure.Speed change feathering arresting gear 50 includes the first speed-variable module 51 and the second speed-variable module 52.
First speed-variable module 51 is used for the shutdown of Wind turbines 1 according to the revolving speed of generator 30 and the acceleration of cabin 40
The second shutdown feathering rate is changed to by the first initial shutdown feathering rate along slurry rate；Wherein, it first shuts down along slurry rate
It is determined by the propeller pitch angle of 1 initial time of Wind turbines, the second shutdown feathering rate is true by the propeller pitch angle at 1 current time of Wind turbines
It is fixed.
As shown in fig. 6, the first speed-variable module 51 includes rotation speed change determination unit 511 and changing unit 512.
Rotation speed change determination unit 511 is used for according to the revolving speed of generator 30, the acceleration of generator 30 and setting most
Big revolving speed obtains the hypervelocity risks and assumptions of generator 30.
Changing unit 512 is used to no longer become smaller when hypervelocity risks and assumptions and the acceleration of cabin 40 continues the first preset time
When less than the first preset value, the shutdown of Wind turbines 1 is changed to second by the first initial shutdown feathering rate along slurry rate
Shut down feathering rate.
It is appreciated that the first speed-variable module 51 can execute above-mentioned steps S101.
Second speed-variable module 52 be used for according to the revolving speed of generator 30 and power by the shutdown of Wind turbines 1 along slurry rate by
Second shutdown feathering rate is changed to third and shuts down feathering rate, and shuts down feathering rate with third and complete feathering and shutdown.
It is appreciated that the second speed-variable module 52 can execute above-mentioned steps S102.
In conclusion a kind of speed change feathering closing method, device and generating set provided by the embodiments of the present application, the speed change
Feathering closing method and device are applied to Wind turbines, and Wind turbines include generator and cabin, and generator is mounted in cabin.
The speed change feathering closing method is according to the revolving speed of generator and the acceleration of cabin by the suitable slurry rate of the shutdown of Wind turbines by first
The the first shutdown feathering rate to begin is changed to the second shutdown feathering rate；Wherein, it first shuts down along slurry rate as at the beginning of Wind turbines
The propeller pitch angle at moment beginning determines that the second shutdown feathering rate is determined by the propeller pitch angle at Wind turbines current time.Further according to power generation
The shutdown of Wind turbines is changed to third by the second shutdown feathering rate along slurry rate and shuts down feathering speed by the revolving speed and power of machine
Rate, and feathering rate is shut down with third and completes feathering and shutdown.
As it can be seen that the speed change feathering closing method of the application is determining the first shutdown along slurry rate and the second shutdown along slurry rate
When, it is determined according to the propeller pitch angle of Wind turbines, the aerodynamic sensitivsty of propeller pitch angle takes into account the loading effect in stopping process
It goes, load fluctuation caused by can reducing due to feathering movement.
Meanwhile being changed in the condition of the second shutdown feathering rate in the first shutdown feathering rate, according to turning for generator
The acceleration of speed and cabin can not only effectively avoid generator hypervelocity risk as switch condition, and be effectively reduced quickly
Ultimate load in stopping process.It is changed in the condition that third shuts down feathering rate in the second shutdown feathering rate, according to hair
The revolving speed and power of motor are as switch condition, it is ensured that conversion of the generator under any wind regime, which can be effectively reduced, to stop
Airborne lotus has wider array of adaptability.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
It is obvious to a person skilled in the art that the application is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case where without departing substantially from spirit herein or essential characteristic, the application can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and scope of the present application is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included in the application.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (10)
1. a kind of speed change feathering closing method, which is characterized in that be applied to Wind turbines, the Wind turbines include generator and
Cabin, the generator are mounted in the cabin, which comprises
According to the revolving speed of the generator and the acceleration of the cabin by the suitable slurry rate of the shutdown of the Wind turbines by initial
First shutdown feathering rate be changed to the second shutdown feathering rate；Wherein, it described first shuts down along slurry rate by the wind-powered electricity generation
The propeller pitch angle of unit initial time determines that the second shutdown feathering rate is true by the propeller pitch angle at the Wind turbines current time
It is fixed；
The shutdown of the Wind turbines is shut down into feathering by described second along slurry rate according to the revolving speed of the generator and power
Rate is changed to third and shuts down feathering rate, and shuts down feathering rate with the third and complete feathering and shutdown.
2. speed change feathering closing method as described in claim 1, which is characterized in that the revolving speed according to the generator and
The shutdown of the Wind turbines is changed to the by initial first shutdown feathering rate along slurry rate by the acceleration of the cabin
Two include: the step of shutting down feathering rate
The super of the generator is obtained according to the maximum (top) speed of the revolving speed of the generator, the acceleration of the generator and setting
Fast risks and assumptions；
When the hypervelocity risks and assumptions no longer become smaller and the acceleration of the cabin to continue the first preset time default greater than first
When value, the shutdown of the Wind turbines is changed to described second by initial the first shutdown feathering rate along slurry rate and is stopped
Machine feathering rate.
3. speed change feathering closing method as claimed in claim 2, which is characterized in that described to work as the hypervelocity risks and assumptions no longer
Become smaller and when the acceleration of the cabin continues the first preset time greater than the first preset value, the shutdown of the Wind turbines is suitable
Slurry rate shuts down the step of feathering rate is changed to the second shutdown feathering rate by initial described first
When the hypervelocity risks and assumptions continue the second preset time no longer become smaller and the acceleration of the cabin to continue first default
When time is greater than the first preset value, the shutdown of the Wind turbines is shut down into the change of feathering rate by initial first along slurry rate
Feathering rate is shut down for second.
4. speed change feathering closing method as described in claim 1, which is characterized in that the revolving speed according to the generator and
The shutdown of the Wind turbines is changed to third by the second shutdown feathering rate along slurry rate and shuts down feathering rate by power
The step of include:
It, will be described when the revolving speed of the generator is lower than third preset value lower than the power of the second preset value and the generator
The shutdown of Wind turbines is changed to the third by the second shutdown feathering rate along slurry rate and shuts down feathering rate.
5. speed change feathering closing method as described in claim 1, which is characterized in that the revolving speed according to the generator and
The shutdown of the Wind turbines is changed to third by the second shutdown feathering rate along slurry rate and shuts down feathering rate by power
The step of include:
When the revolving speed of the generator is lower than third preset value, the wind-powered electricity generation lower than the power of the second preset value, the generator
Unit reaches third preset time and the Wind turbines current time with the time of the second shutdown feathering rate operation
When propeller pitch angle reaches four preset values, the shutdown of the Wind turbines is shut down into the change of feathering rate by described second along slurry rate
Feathering rate is shut down for third.
6. speed change feathering closing method as described in claim 1, which is characterized in that the method also includes:
During the first shutdown feathering rate is changed to the second shutdown feathering rate and described second shuts down
During feathering rate is changed to the third shutdown feathering rate, the variable pitch acceleration for controlling propeller pitch angle is pre- not higher than the 5th
If value.
7. a kind of speed change feathering arresting gear, which is characterized in that be applied to Wind turbines, the Wind turbines include generator and
Cabin, the generator are mounted in the cabin, and described device includes:
First speed-variable module, for being stopped the Wind turbines according to the revolving speed of the generator and the acceleration of the cabin
Machine is changed to the second shutdown feathering rate by the first initial shutdown feathering rate along slurry rate；Wherein, first shutdown is suitable
Slurry rate is determined that the second shutdown feathering rate is worked as by the Wind turbines by the propeller pitch angle of the Wind turbines initial time
The propeller pitch angle at preceding moment determines；
Second speed-variable module, for according to the revolving speed of the generator and power by the shutdown of the Wind turbines along slurry rate by
It is described second shutdown feathering rate be changed to third shut down feathering rate, and with the third shut down feathering rate complete feathering and
It shuts down.
8. speed change feathering arresting gear as claimed in claim 7, which is characterized in that first speed-variable module includes:
Rotation speed change determination unit, for the revolving speed, the acceleration of the generator and the maximum of setting according to the generator
Revolving speed obtains the hypervelocity risks and assumptions of the generator；
Changing unit, for working as, the hypervelocity risks and assumptions no longer become smaller and the acceleration of the cabin continues the first preset time
When less than the first preset value, the shutdown of the Wind turbines is shut down into the change of feathering rate by initial described first along slurry rate
Feathering rate is shut down for described second.
9. speed change feathering arresting gear as claimed in claim 7, which is characterized in that second speed-variable module, for working as institute
State the revolving speed of generator lower than the power of the second preset value and the generator lower than third preset value when, by the Wind turbines
Shutdown the third be changed to by the second shutdown feathering rate along slurry rate shut down feathering rate.
10. a kind of Wind turbines, which is characterized in that including detection device, controller, generator and cabin, the generator peace
In the cabin, the controller is electrically connected with the detection device and the generator；
The detection device is used to acquire the propeller pitch angles of the Wind turbines, the revolving speed of the generator, the cabin in real time
The power of acceleration and the generator, and by the propeller pitch angle of the Wind turbines, the revolving speed of the generator, the cabin
The power of acceleration and the generator is sent to the controller；
The controller is used for the shutdown of the Wind turbines according to the revolving speed of the generator and the acceleration of the cabin
The second shutdown feathering rate is changed to by the first initial shutdown feathering rate along slurry rate；Also according to the revolving speed of the generator
The shutdown of the Wind turbines is changed to third by the second shutdown feathering rate along slurry rate with power and shuts down feathering speed
Rate, and feathering rate is shut down with the third and completes feathering and shutdown；Wherein, it described first shuts down along slurry rate by the wind-powered electricity generation
The propeller pitch angle of unit initial time determines that described second, which shuts down feathering rate, shuts down feathering rate by the first of the Wind turbines
The propeller pitch angle for being changed to for the second shutdown feathering rate moment determines.
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